1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_AUDIO_BUFFER_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_AUDIO_BUFFER_H_ 13 14 #include "module_common_types.h" 15 #include "scoped_ptr.h" 16 #include "typedefs.h" 17 18 namespace webrtc { 19 20 struct AudioChannel; 21 struct SplitAudioChannel; 22 23 class AudioBuffer { 24 public: 25 AudioBuffer(int max_num_channels, int samples_per_channel); 26 virtual ~AudioBuffer(); 27 28 int num_channels() const; 29 int samples_per_channel() const; 30 int samples_per_split_channel() const; 31 32 int16_t* data(int channel) const; 33 int16_t* low_pass_split_data(int channel) const; 34 int16_t* high_pass_split_data(int channel) const; 35 int16_t* mixed_data(int channel) const; 36 int16_t* mixed_low_pass_data(int channel) const; 37 int16_t* low_pass_reference(int channel) const; 38 39 int32_t* analysis_filter_state1(int channel) const; 40 int32_t* analysis_filter_state2(int channel) const; 41 int32_t* synthesis_filter_state1(int channel) const; 42 int32_t* synthesis_filter_state2(int channel) const; 43 44 void set_activity(AudioFrame::VADActivity activity); 45 AudioFrame::VADActivity activity() const; 46 47 bool is_muted() const; 48 49 void DeinterleaveFrom(AudioFrame* audioFrame); 50 void InterleaveTo(AudioFrame* audioFrame) const; 51 // If |data_changed| is false, only the non-audio data members will be copied 52 // to |frame|. 53 void InterleaveTo(AudioFrame* frame, bool data_changed) const; 54 void Mix(int num_mixed_channels); 55 void CopyAndMix(int num_mixed_channels); 56 void CopyAndMixLowPass(int num_mixed_channels); 57 void CopyLowPassToReference(); 58 59 private: 60 const int max_num_channels_; 61 int num_channels_; 62 int num_mixed_channels_; 63 int num_mixed_low_pass_channels_; 64 // Whether the original data was replaced with mixed data. 65 bool data_was_mixed_; 66 const int samples_per_channel_; 67 int samples_per_split_channel_; 68 bool reference_copied_; 69 AudioFrame::VADActivity activity_; 70 bool is_muted_; 71 72 int16_t* data_; 73 scoped_array<AudioChannel> channels_; 74 scoped_array<SplitAudioChannel> split_channels_; 75 scoped_array<AudioChannel> mixed_channels_; 76 // TODO(andrew): improve this, we don't need the full 32 kHz space here. 77 scoped_array<AudioChannel> mixed_low_pass_channels_; 78 scoped_array<AudioChannel> low_pass_reference_channels_; 79 }; 80 } // namespace webrtc 81 82 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_AUDIO_BUFFER_H_ 83